diff --git a/tests/unit/app.test.js b/tests/unit/app.test.js
index 1f90068..267a401 100644
--- a/tests/unit/app.test.js
+++ b/tests/unit/app.test.js
@@ -10,7 +10,9 @@ jest.mock('child_process');
 jest.mock('systeminformation');
 jest.mock('js-yaml');
 jest.mock('readdirp');
-jest.mock('isbinaryfile');
+jest.mock('isbinaryfile', () => ({
+  isBinaryFile: jest.fn(),
+}));
 
 describe('NetbootXYZ WebApp', () => {
   let app;